公开(公告)号：US20250167685A1

公开(公告)日：2025-05-22

申请号：US18839879

申请日：2023-02-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kwang Kyu HWANG ,  Jae Ho LEE ,  Jeong Woo LIM

IPC: H02M3/335 ,  H02M1/00

Abstract: The present disclosure provides a power supply device for supplying, using a DC link voltage of a high-voltage unit of a semiconductor transformer, a control power to a transformer control unit for controlling the high-voltage unit, the power supply device comprising: a converter unit which includes a transformer unit and a switch connected in series to a primary side of the transformer unit, is connected to a DC link of the high-voltage unit, and is configured to convert the DC link voltage and output the converted DC link voltage to a transformer control unit; and a converter control unit configured to control on/off of the switch to convert the DC link voltage, wherein the converter unit comprises a first to a (n+1)th converter (wherein, n is an integer greater than or equal to 1) connected in series.

公开(公告)号：US20250167527A1

公开(公告)日：2025-05-22

申请号：US18841452

申请日：2023-01-25

Applicant: LS ELECTRIC CO., LTD.

Inventor： Min Kyu SEO

IPC: H02B11/173 ,  H01F7/02 ,  H02B11/127

Abstract: A draw in and out apparatus and a cart apparatus transporting the same are disclosed. A draw in and out apparatus according to an aspect of the present disclosure may include a first support unit detachably coupled to an external distribution board; a second support unit movably coupled to the first support unit; a third support unit movably coupled to the second support unit; and a power unit detachably coupled to the third support unit, and configured to be coupled to or detachable from an external circuit breaker, wherein the power unit includes a key withdrawably accommodated in an insertion space provided in the circuit breaker; and a motor member coupled to the key and configured to rotate the inserted key in any one direction of the clockwise direction and counterclockwise direction.

公开(公告)号：US20250157758A1

公开(公告)日：2025-05-15

申请号：US18838697

申请日：2023-01-13

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hanbaek CHUNG

IPC: H01H33/04

Abstract: Disclosed is an air circuit breaker having an insertion/withdrawal linkage type arc cover, the circuit breaker having an arc cover coming into close contact with an arc chute when a main body is inserted into a cradle, thereby preventing a secondary shorting accident of a terminal. The air circuit breaker according to one aspect of the present disclosure comprises: a main body having a plurality of contacts and a plurality of terminals; a cradle into/from which the main body is inserted/withdrawn, and which includes a plurality of terminals correspondingly connected to the plurality of terminals of the main body; a control module which is raised on the cradle, and which is coupled to a coupling module provided at the main body during lowering, so as to electrically connect the main body to the cradle; and an insertion/withdrawal linkage type arc cover which is provided at the cradle so as to be raised together with the control module, and which is lowered when the main body is coupled to the cradle, so as to come into close contact with the upper part of an arc extinguishing part of the main body and cover same.

公开(公告)号：US20250149282A1

公开(公告)日：2025-05-08

申请号：US18682074

申请日：2022-11-14

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ha Su KIM ,  Jin Hee PARK ,  Young Jun SON

IPC: H01H50/38 ,  H01H9/44 ,  H01H50/54

Abstract: The present disclosure discloses an arc path formation unit and a direct current relay including the same, which can effectively guide a generated arc to the outside, including a magnet holder unit disposed between the outside of an arc chamber and the inside of a frame and including a first holder and a second holder different from each other, and a magnet unit attached to one surface of the magnet holder unit facing the arc chamber and forming a magnetic field in the arc chamber, wherein the first holder and the second holder are each bent at a predetermined angle and extended, the magnet unit is attached to both ends thereof, and a magnetic field formed in the magnet unit forms an electromagnetic force together with the electric current energizing through the direct current relay to guide the arc in a direction away from a fixed contact.

公开(公告)号：US20250141193A1

公开(公告)日：2025-05-01

申请号：US18574834

申请日：2021-12-13

Applicant: LS ELECTRIC CO., LTD.

Inventor： Yong Ik PARK

IPC: H02B1/14

Abstract: The present disclosure relates to a shutter assembly and a switchboard comprising same, and provides a shutter assembly comprising: a shutter plate arranged to cover an outer terminal arranged on the rear surface of a switchboard case; and a shutter driving unit which is connected to one side of the shutter plate and which moves the shutter plate in the left and right directions, wherein the shutter driving unit has at least a portion pressed and rotated by means of a circuit breaker according to the entry of the circuit breaker into the switchboard case, so that the outer terminal covered by the shutter plate is exposed toward the inside of the switchboard, and thus the shutter plate is moved.

公开(公告)号：US12288966B2

公开(公告)日：2025-04-29

申请号：US18272145

申请日：2021-11-25

Applicant: LS ELECTRIC CO., LTD.

Inventor： Han-Joo Lee ,  Hong-Ik Yang

IPC: H02B11/167 ,  H01H71/52 ,  H01R13/631

Abstract: One embodiment of a bogie apparatus may comprise: a horizontal frame; vertical frames respectively coupled to both ends of the horizontal frame and provided in a pair; an end bar having both end parts respectively coupled to one end of the pair of horizontal frames; and a connector assembly coupled to the end bar so as to move in at least one direction among upward, downward, left, and right directions. The connector assembly may comprise: a socket portion having a plurality of wiring terminals; a socket mounting portion having the socket portion mounted thereon, and provided in a plate shape; and a guide bushing formed so as to protrude from the socket mounting portion and away from the socket portion, and having a hollow.

公开(公告)号：US12278483B2

公开(公告)日：2025-04-15

申请号：US17928537

申请日：2021-03-30

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwook Sim ,  Jaeho Lee ,  Woonghyeob Song ,  Sunghee Kang

IPC: H02H7/20 ,  H02H3/027 ,  H02H3/05 ,  H02M1/34 ,  H03K17/567

Abstract: The present disclosure relates to a solid insulated switch using a semiconductor; comprising a main circuit unit connected between systems on both sides thereof, and which has a first semiconductor and a second semiconductor arranged in a series; a snubber circuit having a capacitor and a resistor arranged in a series, one end connected in parallel to the front end of the first semiconductor switch, and the other end connected in parallel to the rear end of the second semiconductor switch; a freewheeling circuit, having a diode and a resistor arranged in a series, one end connected to a common contact between the first semiconductor switch and the second semiconductor switch, and the other end connected to the ground; and a mechanical switch for ensuring physical insulation after fault current interruption.

公开(公告)号：US20250080110A1

公开(公告)日：2025-03-06

申请号：US18284815

申请日：2022-02-14

Applicant: LS ELECTRIC CO., LTD.

Inventor： Dongjin YUN ,  Jungwook SIM ,  Woonghyeob SONG ,  Sunghee KANG

IPC: H03K17/687

Abstract: The present disclosure comprises: a semiconductor switch unit including a first semiconductor switch having a drain terminal connected to a power grid, a second semiconductor switch having a drain terminal connected to a load, and first and second diodes each having a positive electrode and a negative electrode respectively connected to a source terminal and the drain terminal of each semiconductor switch; a bypass circuit which connects the drain terminal of the first semiconductor switch to the source terminal of the second semiconductor switch; and a control unit which, when the power grid is connected to the semiconductor circuit breaker, supplies a current to the load through the bypass circuit and the second diode by closing the bypass circuit while the first and second semiconductor switches are turned off, and which, when preset conditions are met, turns on the first and second semiconductor switches so as to open the bypass circuit so that a current is supplied to the load through the semiconductor switch unit.

公开(公告)号：US20250076088A1

公开(公告)日：2025-03-06

申请号：US18727773

申请日：2023-01-02

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ki Hyeon KIM ,  Hyun Wook LEE ,  Min Kyu SEO ,  Woo Young CHOI

IPC: G01D11/00

Abstract: A wireless sensor device is disclosed. The wireless sensor device according to an aspect of the present disclosure may comprise: a sensor module which is placed adjacent to a part of an external member and is configured to sense information on a state of the member; a power module which is placed adjacent to another part of the external member to be physically spaced apart from the sensor module, and is configured to be electrically connected to the sensor module to transfer power to the sensor module; and a conducting wire member which is electrically connected to each of the sensor module and the power module to conduct the power.

公开(公告)号：US12204391B2

公开(公告)日：2025-01-21

申请号：US17802869

申请日：2021-01-22

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hun Park

IPC: G06F1/26 ,  G06F13/40 ,  G06F13/42

Abstract: The present disclosure provides a connector comprising: a line connection part to which a power line for supplying voltage and a signal line through which a communication signal is transmitted are connected; a device connection part which is electrically connected to the power line and the signal line and to which communication devices are connected; and a selection switch unit which, in order to increase the reception sensitivity of the communication signal transmitted to an end communication device positioned at the end among the communication devices, connects the end communication device, which is connected to the device connection part, and a fail-safe voltage circuit disposed inside thereof.